Dear Dave Chinner, In message <20110125083643.GE28803@dastard> you wrote: > > Oh, despite $subject being "RAID0" the filesystems being tested are > on RAID5 and RAID6 with very small chunk sizes on slow SATA drives. > This is smelling like a case of barrier IOs on software raid on > cheap storage.... Right. [Any way to avoid these, btw?] I got side-tracked by the comments about the new (to me) delaylog mount option to xfs; as the results were not exactly as exp[ected I though it might be interesting to report these. But as the subject says, my current topic is tuning RAID0 to avoid exactly this type of bottleneck; or rather looking for tunable options on RAID0 Best regards, Wolfgang Denk -- DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd@xxxxxxx PLEASE NOTE: Some Quantum Physics Theories Suggest That When the Con- sumer Is Not Directly Observing This Product, It May Cease to Exist or Will Exist Only in a Vague and Undetermined State. -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
